Question

How many significant figures should be present in the answer of the following calculations?

(i) [$\dfrac{[ 0.02856 \times 298.15 \times 0.112 ]}{0.5785}$

(ii) 5 × 5.364

(iii) 0.0125 + 0.7864 + 0.0215

Answer 1

Answer:(i) The answer of the calculation  

0.5785

0.02856×298.15×0.112

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 will contain 3 significant figures as 0.112 contains 3 significant figures which is the lowest number of significant figures.

(ii) The answer to the calculation 5×5.364 will contain 4 significant figures as 5.364 contains 4 significant figures which are the lowest number of significant figures. Here, the exact figure 5 is not considered.

(iii) The answer to the calculation 0.0125+0.7864+0.0215 will contain 4 significant figures as the result will be reported to 4 decimal places.

Explanation: